<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <title>5.姓名案例_计算属性_简写方式</title>
        <!-- 引入Vue -->
        <script type="text/javascript" src="../../js/vue.js"></script>
    </head>
    <body>
        <!-- 准备好一个容器-->
        <div id="demo">
            姓：<input type="text" v-model="firstName"> <br>
            名：<input type="text" v-model="lastName"> <br>
            <span>全名：{{fullName}}</span>
        </div>

        <script type="text/javascript">
            //阻止 vue 在启动时生成生产提示。
            Vue.config.productionTip = false 
            new Vue({
                el:'#demo',
                data:{
                    firstName:'zhang',
                    lastName:'san'
                },
                computed: {
                    fullName(){
                        return this.firstName.slice(0,1).toUpperCase() + this.firstName.slice(1) + '-' + this.lastName
                    }
                }
            })
        </script>
    </body>
</html>